It looks great and I wanted to play because I'm a sucker for rhythm games. I do think that the gameplay is more frustrating than fun. I think it would work better if you'd simply just switch using left and right.
Hey ! Sorry you felt frustrated by the controls. :/ I believe switching rows with left & right would have made the game too easy & remove some interest to it. But I understand if you didn't like it.
Thank you for playing. Hope you still managed to have a bit of fun with it.